ZSM-5型
催化作用
选择性
沸石
甲醇
化学
热液循环
复合数
解吸
吸附
无机化学
水热合成
化学工程
核化学
材料科学
有机化学
复合材料
工程类
作者
Wenyuan Jin,Jun Ma,Hao Ma,Xinlong Li,Yuelun Wang
标识
DOI:10.1016/j.jssc.2018.08.004
摘要
A series of core-shell ZSM-5/SAPO-34 composite catalysts with different molar ratios were synthesized using hydrothermal method, and their catalytic performance was tested for the conversion of methanol-to-aromatics. The catalysts were characterized by means of XRD, SEM, NH3-TPD and N2 adsorption-desorption analysis. The results showed that pristine SAPO-34 showed much lower selectivity to aromatics due to its narrow cage structure and lower acid sites. However, with increasing ZSM-5/SAPO-34M ratio, composite zeolite showed higher selectivity to aromatics. As the molar ratio was up to two, the selectivity to aromatics was even higher than that of pristine ZSM-5, indicating that core-shell composite zeolites with hierarchical structure and moderate acid sites were favored for methanol to aromatics. Meanwhile the optimum reaction condition for high yield of aromatics is determined to be 450 °C and 1.5 h−1(WHSV).
科研通智能强力驱动
Strongly Powered by AbleSci AI